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<TITLE>Magic-7.3 Command Reference</TITLE>
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<H1> <IMG SRC=graphics/magic_title2.gif ALT="Magic VLSI Layout Tool Version 7.3">
     <IMG SRC=graphics/magic_OGL_sm.gif ALIGN="top" ALT="*"> </H1>

<H2>plow</H2>
<HR>
Layout stretching and compaction
<HR>

<H3>Usage:</H3>
   <BLOCKQUOTE>
      <B>plow</B> <I>option</I> <BR><BR>
      <BLOCKQUOTE>
         where <I>option</I> may be one of the following:
	 <DL>
	   <DT> <I>direction</I>
	   <DD> Where <I>direction</I> may be any valid Manhattan
		<A HREF=direction.html>direction</A>, and
		causes the plow to be moved in that direction.
	   <DT> <B>boundary</B>
	   <DD> Set boundary around area plowing may affect
	   <DT> <B>help</B>
	   <DD>	Print help information
	   <DT> <B>horizon</B> <I>n</I>
	   <DD> Set the horizon for jog introduction to <I>n</I> lambda units.
	   <DT> <B>jogs</B>
	   <DD> Reenable jog insertion (set horizon to 0)
	   <DT> <B>selection</B> [<I>direction</I> [<I>distance</I>]]
	   <DD> Plow the selection in the indicated <A HREF=direction.html>
		<I>direction</I></A> for the indicated
		<A HREF=distance.html><I>distance</I></A>.
	   <DT> <B>straighten</B>
	   <DD> Automatically straighten jogs after each plow
	   <DT> <B>noboundary</B>
	   <DD> Remove boundary around area plowing may affect
	   <DT> <B>nojogs</B>
	   <DD> Disable jog insertion (infinite jog horizon)
	   <DT> <B>nostraighten</B>
	   <DD> Don't automatically straighten jogs after each plow
	 </DL>
      </BLOCKQUOTE>
   </BLOCKQUOTE>

<H3>Summary:</H3>
   <BLOCKQUOTE>
      The <B>plow</B> command implements a sophisticated method of
      stretching and compacting layout.  The cursor box can be
      used to shove layout in one direction or another, preserving
      net connectivity through the modifications. <P>

      Results of <B>plow</B> are usually messier than most VLSI
      designers care to cope with.  The best cell compaction is
      realized with careful floorplanning considerations, not
      brute force pushing and shoving.
   </BLOCKQUOTE>

<H3>Implementation Notes:</H3>
   <BLOCKQUOTE>
      <B>plow</B> is implemented as a built-in command in <B>magic</B>.
   </BLOCKQUOTE>

<H3>See Also:</H3>
   <BLOCKQUOTE>
      <A HREF=straighten.html><B>straighten</B></A> <BR>
   </BLOCKQUOTE>

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<P><I>Last updated:</I> October 8, 2004 at 8:32pm <P>
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